vanilla111 opened a new issue #3633:
URL: https://github.com/apache/incubator-dolphinscheduler/issues/3633


   ## description
   
   The dependent node is used when the dependent task is executed periodically. 
In the original design, if the dependent node starts execution first, but the 
process instance of a task does not exist, the dependent node will be directly 
judged as a failure. Now, with the addition of new features, dependent nodes 
can choose to wait for a period of time before starting execution.
   
   To realize the idea, this feature adds a new timeout data structure, which 
mainly contains two attribute members: timeout and check interval. When the 
dependent node is running, if this function is turned on, it will check whether 
the pre-process instances have started at regular intervals according to the 
check interval. If all pre-process instances have started within the timeout 
period, then run directly. Otherwise, the timeout fails.
   
   ## discuss mail list
   
   [Discuss on new feature for dependent node 延时等待方案讨论
   
](https://lists.apache.org/thread.html/r32c1f74d4d977de5803d3980f34ec1f55a7328fdf22d109b1f97c9d3%40%3Cdev.dolphinscheduler.apache.org%3E)


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